5 ms·
power generated on a power meter is by no means accurate measure for personal energy expenditure. Unless of course you are machine running at 100% efficiency.
by rmm 10y ago
power generated on a power meter is by no means accurate measure for personal energy expenditure.
Unless of course you are machine running at 100% efficiency. (The only 24% efficiency factor for humans is based on so many assumptions)
Only real way to measure energy expenditure accurately is using breathing measurements. VCO2/VO2
- iplaw 10y agoA trained cyclist is roughly 25% efficient, and 1 kCal = 4.184 kJ. The power meter precisely measures kJ. The end result is a near 1:1 ratio between kCal burned and kJ measured. Sure, the power meter under reports total expenditure. For example, it doesn't exactly account for BMR, increased expenditure due to elevated heart and respiration rate, utilization of muscles in your arms and torso, etc. However, it is extremely accurate compared to the alternatives.